# SDR 9JLA20131217545

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 10, 2013
- Submitted: December 17, 2013
- Operation: Air carrier
- Aircraft: [N560HN](https://openairdocs.org/aircraft/N560HN), registered now
- Make and model: Cessna 560XL
- Registry model: [Cessna 560XL](https://openairdocs.org/model/cessna-560xl) (OpenAirDocs)
- Aircraft serial: 5605015
- Aircraft time: 2,864 hours, 2,298 cycles
- Engine: Pwa PW545A
- Engine time: 2,861 hours, 2,297 cycles
- System (JASC): [7261 · Turbine Engine Oil System](https://openairdocs.org/jasc/7261)
- Part: Carbon Seal
- Condition: Defective
- Location: Nr 1 Engine
- Stage of operation: IN
- How discovered: O
- Nature of condition: K
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9JLA20131217545

## Discrepancy

DURING THE POST FLIGHT CHECKLIST ON DEC 10TH IT WAS DISCOVERED THAT THE OIL LEVEL FOR THE NR 1 ENG WAS BELOW THE INSPECTION SIGHT GLASS WITH OIL STREAKING PRESENT IN THE BYPASS DUCT. THE TROUBLESHOOTING FOR THE DEC 10TH OIL LEAK EVENT FOUND THAT THE OIL LEAK WAS A RESULT OF THE FAULT WITH THE NR 4 BEARING CARBON SEAL.  SEVERAL DEFECTS WERE NOTED IN THE PLASMA COATING SEALING SURFACE OF THE CARBON SEAL RUNNER.

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